<template>
  <div class="login-bg">
    <div v-for="n in 5" :key="n" />
  </div>

  <div class="login">
    <el-form ref="loginRef" :model="loginForm.model" :rules="loginForm.rules" class="login-form">
      <h3 class="title">nest-admin后台管理系统</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.model.username" type="text" size="large" auto-complete="off" placeholder="账号">
          <template #prefix>
            <svg-icon icon-class="user" class="input-icon" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        
        <el-input v-model="loginForm.model.password" type="password" size="large" auto-complete="off" placeholder="密码" @keyup.enter="handleLogin">
          <template #prefix>
            <svg-icon icon-class="password" class="input-icon" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input v-model="loginForm.model.code" size="large" auto-complete="off" placeholder="验证码" style="width: 63%" @keyup.enter="handleLogin">
          <template #prefix>
            <svg-icon icon-class="validCode" class="input-icon" />
          </template>
        </el-input>
        <div class="login-code" v-html="codeUrl" @click="getCode"></div>
      </el-form-item>
      <el-checkbox v-model="loginForm.model.rememberMe" style="margin: 0px 0px 25px 0px">记住密码</el-checkbox>
      <el-form-item style="width: 100%">
        <el-button :loading="loading" size="large" type="primary" style="width: 100%" @click.prevent="handleLogin">
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div style="float: right" v-if="register">
          <router-link class="link-type" :to="'/register'">立即注册</router-link>
        </div>
      </el-form-item>
    </el-form>

    <div class="el-login-footer">
      <span>Copyright © 2018-2024 nest-admin All Rights Reserved.</span>
    </div>
  </div>
</template>

<script setup>
import { getCodeImg } from '@/api/login'
import Cookies from 'js-cookie'
import { encrypt, decrypt } from '@/utils/jsencrypt'
import useUserStore from '@/store/modules/user'

const userStore = useUserStore()
const route = useRoute()
const router = useRouter()
const loginRef = ref('')

const loginForm = reactive({
  model: {
    username: 'admin',
    password: '123456',
    rememberMe: false,
    code: '',
    uuid: ''
  },
  rules: {
    username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
    password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
    code: [{ required: true, trigger: 'change', message: '请输入验证码' }]
  }
})

const codeUrl = ref('')
const loading = ref(false)
// 验证码开关
const captchaEnabled = ref(true)
// 注册开关
const register = ref(false)
const redirect = ref(undefined)

watch(
  route,
  (newRoute) => {
    redirect.value = newRoute.query && newRoute.query.redirect
  },
  { immediate: true }
)

function handleLogin() {
  loginRef.value.validate((valid) => {
    if (valid) {
      loading.value = true
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.model.rememberMe) {
        Cookies.set('username', loginForm.model.username, { expires: 30 })
        Cookies.set('password', encrypt(loginForm.model.password), {
          expires: 30
        })
        Cookies.set('rememberMe', loginForm.model.rememberMe, { expires: 30 })
      } else {
        // 否则移除
        Cookies.remove('username')
        Cookies.remove('password')
        Cookies.remove('rememberMe')
      }
      // 调用action的登录方法
  
      userStore
        .login(loginForm.model)
        .then(() => {
          router.push({ path: redirect.value || '/' })
        })
        .catch(() => {
          loading.value = false
          // 重新获取验证码
          if (captchaEnabled.value) {
            getCode()
          }
        })
    }
  })
}

function getCode() {
  getCodeImg().then((res) => {
    captchaEnabled.value = res.data.captchaEnabled === undefined ? true : res.data.captchaEnabled
    if (captchaEnabled.value) {
      codeUrl.value = res.data.img
      loginForm.model.uuid = res.data.uuid
    }
  })
}

function getCookie() {
  const username = Cookies.get('username')
  const password = Cookies.get('password')
  const rememberMe = Cookies.get('rememberMe')
  loginForm.model = {
    username: username === undefined ? loginForm.model.username : username,
    password: password === undefined ? loginForm.model.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
  }
}

getCode()
getCookie()
</script>

<style lang="scss" scoped>
@import '@/assets/styles/login.scss';

.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background: #f0f2f5;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 10px;
  }
}

.login-code {
  width: 33%;
  height: 40px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #909399;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
</style>
